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Please show your math where applies, dihybrid problmes especially, thank you



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on should have a basic idea about Mendelian genetics,
linkage and linkage disequilibrium. l. 2. In a cross between heterozygotes, what fraction of the
offspring should have the dominant phenotype? If you are doing a standard dihyhrid cross, what fraction of
the ofispring in the F2 should have the dominant phenotype for one trait and the recessive phenotype for the other trait,
if there is no linkage? . In a standard dihybrid cross, what fraction of the ofispring in the F2 should have the dominant phenotype for one trait and the recessive phenotype for the other trait, if there is
linkage? . You do a standard dihybrid cross. In observing the F,, what would make you think there was linkage? What would you
do to measure the linkage between the two traits? . You discover a mutation that increases the activity of an enzyme, and this mutation results in a decrease in fitness. You are unable to identify any linkage disequilibrium for
this mutation, even when you look at genetic loci that are
only 1 cM away. Does this make any sense? . If two loci are in linkage disequilibrium, what information
would you need to know to estimate how long ago the
event causing linkage disequilibrium occurred? a) Genetic distance
b) Physical distance
c) Both a) and b)

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